from flask import render_template, current_app, session, g, abort, jsonify, request

from info import db
from info.models import News, User, Comment, CommentLike
from info.utils.captcha.response_code import RET
from info.utils.common import user_login_data
from . import news_blu


@news_blu.route('/followed_user', methods=["POST"])
@user_login_data
def followed_user():
    """关注/取消关注用户"""
    if not g.user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    user_id = request.json.get("user_id")
    action = request.json.get("action")

    if not all([user_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ("follow", "unfollow"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询到关注的用户信息
    try:
        target_user = User.query.get(user_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据库失败")

    if not target_user:
        return jsonify(errno=RET.NODATA, errmsg="未查询到用户数据")

    # 根据不同操作做不同逻辑
    if action == "follow":
        if target_user in g.user.followed:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前已关注")
        target_user.followers.append(g.user)
    else:
        if target_user not in g.user.followed:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前未关注")
        target_user.followers.remove(g.user)

    # 保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据保存错误")

    return jsonify(errno=RET.OK, errmsg="操作成功")


@news_blu.route("/comment_like", methods=["POST"])
@user_login_data
def collect_like():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    if not all([comment_id, news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ["add", "remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        comment_id = int(comment_id)
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not comment:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    if action == "add":
        if comment not in user.like_comment:
            user.like_comment.append(comment)
            comment.like_count += 1
    else:
        if comment in user.like_comment:
            user.like_comment.remove(comment)
            comment.like_count -= 1

    return jsonify(errno=RET.OK, errmsg="操作成功")


@news_blu.route("/news_comment", methods=["POST"])
@user_login_data
def comment_news():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    news_id = request.json.get("news_id")
    comment_content = request.json.get("comment")
    parent_id = request.json.get("parent_id")

    if not all([news_id, comment_content]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_content
    if parent_id:
        comment.parent_id = parent_id

    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno=RET.OK, errmsg="OK", data=comment.to_dict())


@news_blu.route("/news_collect", methods=["POST"])
@user_login_data
def collect_news():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    news_id = request.json.get("news_id")
    action = request.json.get("action")

    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ["collect", "cancel_collect"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    if action == "cancel_collect":
        if news in user.collection_news:
            user.collection_news.remove(news)
    else:
        if news not in user.collection_news:
            user.collection_news.append(news)

    return jsonify(errno=RET.OK, errmsg="操作成功")


@news_blu.route("/<int:news_id>")
@user_login_data
def news_detail(news_id):
    # redis_store.set("name", "laowang")
    user = g.user

    # 右侧的新闻排行的逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(6).all()
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表，里面装的就是字典
    news_dict_li = []
    # 遍历对象列表，将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    news = None

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)

    news.clicks += 1

    is_collected = False
    if user:
        if news in user.collection_news:
            is_collected = True

    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    comment_like_ids = []
    if g.user:
        try:
            comment_ids = [comment.id for comment in comments]
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                     CommentLike.user_id == g.user.id).all()
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)

    comment_dict_li = []
    for comment in comments:
        comment_dict = comment.to_dict()
        comment_dict["is_like"] = False
        if comment.id in comment_like_ids:
            comment_dict["is_like"] = True
        comment_dict_li.append(comment_dict)

    is_followed = False
    # if 当前新闻有作者，并且 当前登录用户已关注过这个用户
    if news.user and user:
        # if user 是否关注过 news.user
        if news.user in user.followed:
            is_followed = True

    data = {
        "user": user.to_dict() if user else None,
        "news_dict_li": news_dict_li,
        "news": news.to_dict(),
        "is_collected": is_collected,
        "is_followed": is_followed,
        "comments": comment_dict_li
    }
    return render_template("news/detail.html", data=data)
